The phase space transformer instrument

Article type: Research Article

Authors: Henggeler, W. | Boehm, M.^; | Allenspach, P. | Furrer, A.

Affiliations: Laboratory for Neutron Scattering, ETHZ & PSI, CH-5232 Villigen PSI, Switzerland | Institut Laue-Langevin, 6, rue Jules Horowitz, F-38042 Grenoble Cedex 9, France

Note: [] Corresponding author. E-mail: [email protected]

Abstract: We performed a feasibility study for a phase space transformer (PST) instrument to be implemented at a cold neutron guide at SINQ (PSI, Switzerland). The study is based on both analytical calculations and Monte-Carlo simulations with particular accent on the energy resolution and intensity. We show that the PST instrument is able to deliver thermal neutrons by up-scattering, with fluxes comparable to the today’s best thermal time-of-flight spectrometers, but with considerably better energy resolution.

Keywords: Monochromator, Phase-space transformer, Doppler effect, Monte Carlo simulation, Bragg’s law

DOI: 10.1080/10238160512331329965

Journal: Journal of Neutron Research, vol. 13, no. 4, pp. 251-260, 2005